The Porous Concrete for Rigid Pavement

Abstract

Roads play an important role as a connection between locations and can facilitate the efficient mobility of people's economic activities. Five tests are involved in evaluating of the porous concrete, such as the slump test, compressive strength test, permeability test, flexure test, and load capacity test (loading test). Meanwhile, there are three types of soil: peat, clay, and hard. The compressive strength test measured an average compressive strength between 24.17-27.36 MPa. According to the permeability test, the average speed of water infiltration on the porous concrete rigid pavement was 20 seconds on clay soil and 55.344 seconds on peat soil, with large areas drained on porous concrete rigid pavement of 346.185 cm2 with 5 litres of water used, whereas it was 6.554 seconds with a flow area of 288.75 cm2 and 2 litres of water used on hard soil. The Loading Test was conducted with a 10-ton. The maximum difference in deflection was 1-2 cm. In addition, there were no cracks in the porous concrete rigid pavement with a porous concrete rigid pavement thickness of 15 cm in three different soil conditions. A track with porous concrete rigid pavement on clay, hard soil, or peat soil can accommodate a maximum payload of 10 tons.

Comprehensive Assessment of the Effectiveness of the Application of Foam and Extruded Polystyrene in the Railway Substructure

“…Challenges pertaining to the protection of frost-susceptible subgrade surfaces against frost effects, as well as monitoring subsequent changes in soil and building material properties, are mainly addressed by railway administrations in regions characterised by high frost indices, notably the Nordic countries within Europe [2][3][4]. Ongoing research abroad efforts predominantly focus on frost heave [5][6][7][8][9], freezing of water in porous materials [10][11][12], and thermo-technical characteristics of soils and building materials [13][14][15][16][17][18][19][20][21]. Regarding the application of thermal insulation materials within the structural layers or the broader track substructure, more comprehensive and enduring practical experience is globally available in the utilisation of foam thermal insulation materials, specifically EPS and XPS [22][23][24][25][26], collectively known as geofoam (GFM) in the professional and scientific literature.…”